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Left-side Stroke

Definition

The cerebrum is the largest part of the brain. It is made of a left and a right hemisphere. In most people, the left hemisphere is in charge of the functions on the right-side of the body. It is also involved in abilities such as the ability to speak, or use language.

A left-side stroke happens when the blood supply to the left side of the brain is interrupted. Without oxygen and nutrients from blood, the brain tissue quickly dies.

There are two main types of stroke: ischemic and hemorrhagic. An ischemic stroke is the most common type of stroke.

Causes

An ischemic stroke is caused by a blockage of the blood flow, which may be due to:

A clot from another part of the body like the heart or neck. The clot breaks off and flows through the blood until it becomes trapped in a blood vessel supplying the brain.

A clot that forms in an artery that supplies blood to the brain.

A tear in an artery supplying blood to the brain. Called an arterial dissection.

A hemorrhagic stroke is caused by a burst blood vessel. Blood spills out of the broken blood vessel and pools in the brain. This interrupts the flow of blood and causes a build up of pressure on the brain.

Symptoms

Symptoms occur suddenly. Exact symptoms will depend on the part of the brain affected. Rapid treatment is important to decrease the amount of brain damage. Brain tissue without blood flow dies quickly.

Call for emergency medical help
right away if you notice any of the following:

Sudden weakness or numbness of face, arm, or leg, especially on the right side of the body

Diagnosis

A physical exam will be done to look for muscle weakness, visual and speech problems, and movement difficulty. If possible, you will be asked about your symptoms and medical history. Your doctor may use a or
of the brain to confirm a stroke or rule out other conditions.

Revision Information

This content is reviewed regularly and is updated when new and relevant evidence is made available. This information is neither intended nor implied to be a substitute for professional medical advice. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with questions regarding a medical condition.